Hi there,
First, 04006C might not have had all the VINs processed yet. Or, they found that there isnt an issue for your car, I cannot speculate.
As for your questions, with over 50 different reasons for a column lock failure, how can I possibly speculate as to what, if anything, would go wrong??
No one is willing to talk about the entire system. Everyone seems to think there is only 2 or 3 things that cause column lock issues, this is totally incorrect.
Personally, working in a Chevrolet dealership, I have seen rubbed through wiring harnesses, bad actuators, bad BCMs, bad feedback relays, insufficient terminal tension at different parts of the system, blown fuses due to CLB. But the biggest issue, is the incorrect battery voltage supply.
So, with all of that, it would be IMPOSSIBLE to correctly answer your question with FACTS, as to the "FIX" and if it works or not. The recall addresses the largest problem area, the actuator itself.
Some relays have gone bad after, yes, but that can be addressed by the special policy.
As far as the fuel system shutoff, that has always been there, even before the recall was implemented.
Allthebest, c4c5